@Marvin how do i deploy from my local machine that takes an argument from trigger api? give an example

Below is an example of how you can deploy a flow from your local machine which can take an argument when triggered by the Prefect API. This example doesn't include the detail of using the Trigger API directly, but you generally need to deploy your flow to a Prefect backend and then trigger it via an API call with the desired arguments. First, here's a basic flow example:

python
from prefect import flow, task

@task(task_run_name="Adding {x} and {y}")
def add(x: int, y: int) -> int:
    return x + y

@flow
def my_flow(x: int, y: int):
    first_result = add(x, y) 
    second_result = add(first_result, first_result)
    return add(first_result, second_result)

if __name__ == "__main__":
    my_flow(1, 2)  # Here, you would replace (1, 2) with your argument values.

For more detailed steps or further examples including API-trigger specifics, I would recommend searching the Prefect documentation or community forums for scenarios similar to yours. Due to the complex nature of deployments and triggering flows, your requirements might necessitate a more in-depth approach. Here is the example code used for the above example.

@Marvin how do i deploy this on prefect cloud

To deploy on Prefect Cloud, you would need to build a deployment which involves creating a YAML file that describes your flow's execution settings. This file can be sent to the server at any time to create or update the deployment using the command

prefect deployment apply

. Here's a link that touches on this topic and might offer more context on the deployment process to Prefect Cloud: Prefect Global Coordination Plane. Additionally, note that Prefect Cloud provides several features such as automation, events, webhooks, user management tools for collaboration, and error summaries. More information about Prefect Cloud and the capabilities it provides can be found at the following link: Welcome to Prefect Cloud. For a step-by-step guide and best practices, you should consult the Prefect documentation or tutorials specific to deploying on Prefect Cloud. If you need more detailed information or help with the actual commands and procedures, let me know, and I can search for a code example or more specific documentation.

@Marvin how to start worker queue and agent pool in background in a vm

To start a work queue (also known as a work pool) and an agent in the background on a virtual machine, you need to follow these steps: 1. Create and verify the work pool in Prefect UI: - Navigate to the Work Pools tab in your Prefect UI. - Ensure you see your desired work pool (e.g.,

my-docker-pool

) listed and verify its status. 2. Start the worker: - Workers are essential processes that execute scheduled flow runs on specified infrastructure. Unfortunately, the document does not provide direct instructions for running agents and workers in the background. However, typically, you would use a tool like

nohup

or

screen

in a Unix-like system to run commands in the background. - Example with `nohup`:

bash
     nohup prefect agent start --pool my-pool &

- Alternatively, you could use

screen

or

tmux

to start an agent within a detachable session. - Example with `screen`:

bash
     screen -dmS agent prefect agent start --pool my-pool

3. Start an agent with a specified pool: - Use the

prefect agent start --pool my-pool

command to start an agent that will pick up flow runs queued in

my-pool

. For detailed steps and specific commands, please refer to the Prefect documentation, and feel free to adjust the examples above as per your VM's environment and requirements. Here are the relevant links for reference: - Starting a work pool and worker: Prefect Workers Tutorial - Starting an agent: Prefect Agents Documentation Make sure to check the documentation for the version of Prefect you are using, as the instructions may differ between releases. If you are running Prefect 2.0, you might need to refer to the specific documentation for that version.

@Marvin how do i trigger my flow using api and pass parameters and provide authentication key

Triggering a flow via the Prefect API and passing parameters involves several steps, including authenticating your API request. However, the documents fetched do not provide a direct step-by-step process on how to do this. For triggering a flow and passing parameters, you need to: 1. Prepare an API request to your Prefect endpoint that pertains to flow run creation. 2. Include the parameters you want to pass to the flow in the request payload. 3. Add the necessary headers for authentication, which will typically include your Prefect API key. The authentication key should be included as a bearer token within the

Authorization

header of your HTTP request. Here's a conceptual example of how such a request might look:

python
import requests

url = '<https://api.prefect.io/graphql>'
headers = {
    'Authorization': 'Bearer YOUR_PREFECT_API_KEY',
    'Content-Type': 'application/json'
}
payload = {
    'query': '''
        mutation($input: createFlowRunInput!) {
            createFlowRun(input: $input) {
                id
            }
        }
    ''',
    'variables': {
        'input': {
            'flowId': 'YOUR_FLOW_ID',
            'parameters': {
                'param1': 'value1',
                'param2': 'value2'
            }
        }
    }
}

response = <http://requests.post|requests.post>(url, json=payload, headers=headers)
print(response.json())

Note: Replace

YOUR_PREFECT_API_KEY

,

YOUR_FLOW_ID

,

param1

,

param2

,

value1

, and

value2

with your actual API key, flow ID, and parameter names and values. For detailed instructions, please refer to Prefect's documentation or API references. These will provide guidance on the correct endpoints to use, the expected request format, and how to handle authentication properly. If there is an official API client library provided by Prefect for your preferred programming language, using that can also simplify the process of making authenticated API calls. Remember to ensure your API key remains secure and isn't exposed in shared code or logs. Unfortunately, I don't have more specific documentation to link you to at this moment, but you should be able to find more relevant information in the Prefect documentation, specifically under sections discussing API usage, flow run creation, and parameterization.

@Marvin I am getting Authorization error even though i have used api key extracted from my account

Facing an Authorization error even with the correct usage of an API key from your account could be caused by several issues. Review the following tips and consider checking the related topics from GitHub issues: 1. Ensure proper API key permissions: Verify that the API key you are using has the correct permissions to perform the action you're trying to complete. 2. Verify the key hasn't been rotated: If there's a chance that the API key was rotated after you extracted it, you might be using an outdated key. Check to see if the key is still valid. 3. Check the API key's scope: Ensure that the key's scope is appropriate for the API operations you're attempting to perform. 4. Inspect for typos or errors: Double-check the API key for any accidental characters, spaces, or missing parts when copying it. 5. Use proper header format: Ensure the API key is included in the HTTP

Authorization

header as a Bearer token in the correct format. In the provided GitHub issue Rotate API Keys via API, a user discusses the need for rotating API keys, which indicates the importance of managing API keys correctly. Although this issue isn't a direct match to your problem, it emphasizes that API key management can impact your authentication process. If you are sure that the issue should not be occurring (i.e., the API key is correct, active, and has proper permissions), consider reaching out to Prefect support for further investigation. It's possible there might be a problem with Prefect's service or an underlying bug. The other issues listed, such as Default Parameter type cannot be set to "None" (#9578) and Prefect API "flow_runs/filter-minimal" limit fails sporadically (#11442), may not be directly related to your Authorization error but could provide additional context if you're having other issues with the API.